STEP 3 - How To Use Redeem CodesXbox 360 Users : Go to Xbox 360 tab and To Generate your Rock Band 3 Xbox Marketplace Redeem Download Code, Press the Generate button. Now You Need to redeem this code on Xbox Live Marketplace,
just go to Dashboard, press your INFO Center Guide Button on the controller and move menu to Marketplace and select Redeem Code.

PS3 Users : Go to PS3 tab and To Generate your Rock Band 3 PlayStation Store promotion code, Press the Generate button. When you have your code, redeem it in the PlayStation Store.